The Residential Real Estate Crash Index Message Board

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Strategies & Market Trends : The Residential Real Estate Crash Index

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To: patron_anejo_por_favor who wrote (99581)	1/10/2008 3:52:03 PM
From: Drygulch Dan	Read Replies (2) of 306849

Some times I am off running a boat. It main motive force is a set of sails (wind power). It also has a rather extensive amount of battery power which is split between a house bank and engine starter. These batteries deplete over time and from use. This necessitates recharging them. The boat is set up to benefit from a variety of sources. It can be plugged into shore power at a dock(quietest and most convenient) but lots of times the marinas charge money for this service. It has some solar panels, these are quiet but things like fixed mounting and shadowing reduce efficiency along with declination due to Latitude. The boat also has a wind powered generator which is generally quite quiet but noise increases with wind speed. This requires ambient winds to be 10 Kts or better. It is quite effective when the wind is blowing but sailors typically try to anchor in wind sheltered places. The boat additionally carries a small gas powered generator and a few gallons of gas. I dislike this option because of the volatile nature of gasoline besides it is quite noisy when running. Then finally there is the old reliable supercharging alternator on the 50 Hp diesel engine. This generator puts out 110 amps at 12 VDC if the charging circuitry will accept that input load. Solar and wind sources are nice to have as auxiliary, and the gas generator will make a nice boat anchor someday when the wind gets up really bad, but that diesel alternator is worth its weight in gold for restoring the house bank. Solar and wind sources reduces the daily recharging from two hours of dieseling a day to about 2 hours dieseling ever 3 days. Not quite "off the grid" sailing, but pretty close. Managing power on a boat is far more demanding than managing power in a house or a car. However it will be a cold day somewhere when solar and wind can successfully power cars en mass or take average houses totally off the grid. Those who believe otherwise should consult their local tooth fairy.

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